User manual

Littfinski DatenTechnik (LDT)
Multi-Digital
s88-N
Feedback Module
with integrated
8-fold track occupancy detectors
for the s88-feedback bus
from the Digital-Professional-Series !
RM-GB-8-N-F Part-No.: 320102
>> finished module <<
controls up to 8 different tracks
(current detection from 0,001[1mA] up to 3 ampere).
integrated voltage control
(avoiding “track free” feedback in case of power failures).
separated by opto isolation
(between track and feedback bus).
for s88 standard connections and s88-N
(with 6-poles s88-pinbars and RJ-45 sockets].
suitable for following digital systems:
Märklin Digital~/=, Central Station 1 and 2, Intellibox, TWIN-
CENTER, HSI-88 (-USB), EasyControl, ECoS, DiCoStation.
This product is not a toy! Not suitable for children under 14 years of age! The kit
contains small parts, which should be kept away from children under 3! Improper
use will imply danger of injuring due to sharp edges and tips! Please store this
instruction carefully.
CE Part-No.:
1370370
Introduction / Safety Information:
You have purchased the 8-fold feedback module RM-GB-8-N
with integrated detection of track occupancy for your model
railway. The RM-GB-8-N is a high quality product that is
supplied within the Digital-Professional-Series of
Littfinski DatenTechnik (LDT).
We wish you having a good time using this product.
The finished module comes with 24 month warranty.
Please read the following instructions carefully. Warranty will
expire due to damages caused by disregarding the operating
instructions. LDT will also be not liable for any consequential
damages caused by improper use or installation.
Attention: Please switch off your digital control unit and
unplug all transformers from AC-current before starting
to assemble the unit.
General functional description:
The RM-GB-8-N feedback module combines the occupied
track detection and the feedback report function. The 8
detectors for occupied tracks work by detection of current.
In cases a connected track is occupied by an object with a
minimum of 0,001 Ampere (1mA) consuming current, the
track will be detected as occupied.
Locomotive decoder, coach lights or axles with electrical
resistance are consumer of electrical power and therefore
induce the detection of an occupied track.
The maximum DC current on the tracks can be up to 3
Ampere per output. A peak current of 7 Ampere will be
possible at short term. Then has the booster to identified the
overload or the short circuit and has to cut-off the current.
The track voltage and the feedback bus are separated by
opto-galvanic. The current for the tracks can therefore safely
be supplied from different transformers without having a
negative effect on the digital control units.
The modular concept of occupied track detectors and
feedback decoders implements a considerable galvanical
problem: as soon as there is no electrical power on the tracks,
all tracks are detected as free because no consuming current
is detected. There are track occupied detectors available on
the market which use an auxiliary voltage to solve this
problem, but this can influence sometimes the locomotive
decoder causing disturbances and is therefore no suitable
solution.
As the feedback module RM-GB-8-N has a build-in intelligence
(microprocessor Z86... [IC1], we have integrated a solution
called voltage monitor. In case of voltage drop or short circuit
there is no inaccurate “free track” detection and report back via
the feedback bus to the digital control unit or the PC. All track
occupancies will be frozen“ during this phase of voltage
interruption.
As soon as there is current on the tracks again the actual
situations on the tracks will be detected and reported back via
the feedback bus.
The RM-GB-8-N feedback module is suitable for a
decentralize installation underneath of the model railway
installation. There are 4-bores on the edges of the modules for
quick and easy installation. Suitable assembly parts (plastic
distance spacers and wood screws) are available under the
order code MON-SET.
Connecting the RM-GB-8-N to Digital
Central Units respectively Interfaces:
On Märklin INTERFACE, Central Station 1 and 2, Intellibox,
TWIN-CENTER, EasyControl, ECoS, HSI-88-(USB) and
DiCoStation can be the occupation reports of up to 62
RM-GB-8-N evaluated.
Up to 6 feedback modules RM-GB-8-N can be connected to
each Märklin MEMORY.
Electrical power will be supplied from the s88-feedback bus
to all feedback modules. This will apply for the s88-standard
feedback modules and as well as for the feedback modules
RM-GB-8-N. The power consumption of the standard feedback
modules is considerable low. The RM-GB-8-N requires 0,003
Ampere (3mA) only.
Operating Instruction
s88-N
OUT
IN
s88-N

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